Rotary brush



May 10, 1960 R. o. PETERSON ROTARY BRUSH Original Filed July 12, 1950 INVEN TOR. P086 0. PETERSO BY mvfm A TTO/ZA/E V6 SEfltCS pat tp a ROTARYBRUSH Ruben 0. Peterson, University Heights, Ohio, assignor to TheOsborn Manufacturing Company, Cleveland, Ohio, a corporation of OhioOriginal application July 12, 1950, Serial No. 173,464, now Patent No.2,757,401, dated August 7, 1956. Divided and this application January26, 1956, Serial No. 561,446

3 Claims. (c1. 15-182 This invention relates as indicated to rotarybrush construction, and more particularly to a pre-assembled rotarybrush unit adapted to be mounted upon an arbor or mandrel and readilyremoved therefrom when it is desired to replace the same.

Power driven rotary brushes mounted upon shafting are commonly employedfor a wide variety of purposes including the surface conditioning ofmetal sheets and the like and; some such brushes, commonly cylindricalin form and known as roller brushes, are quite large and heavy. They maybe comprised of a number of annular brush sections assembled in closeside-by-side relationship or a relatively long length of helically woundbrush strip maybe utilized. In the latter case, the same may be woundupon a tubular core adapted closely to fit a relatively large diameterarbor or to be supported upon a relatively small diameter arbor by meansof annular adapters. The assembly and disassembly of such brushes hasalways constituted something of a problem when it is desired to replacea worn-out brush witha new brush or to substitute a dilferent size brushon the arbor. In my Patent No. 2,609,559 I disclose a novel form ofrotary brush including retaining means considerably simplifying themounting and replacement of this type of brush while at the same timeproviding a very strong assembly adapted to withstand high speedoperation and the stress-es and strains to which the same is subjectedin use.

It is a principal object of this present invention to provide areplaceable pre-assembled brush unit which may be quickly installed andremoved without difiiculty and without the necessity of employingspecial tools.

Another object is to provide means whereby helically wound brush stripis permanently secured to a tubular core for mounting as a unit oneither a large or small diameter arbor.

Still another object is to provide such brush unit adapted to be mountedupon and driven by a variety of different types of arbors includingsquare, polygonal and round arbors.

A further object is to provide such brush unit which is designed forpassage of a fluid, either gaseous or liquid, therethrough forcooolingand other purposes.

Other objects of my invention will appear as the description proceeds.

To the accomplishment of the foregoing and related ends, said inventionthen comprises the features hereinafter fully described and particularlypointed out in the claims, the following description and the annexeddrawing setting forth in detail certain illustrative embodiments of theinvention, these being indicative, however, of but a few of the variousways in which the principle of the invention may be employed.

In said annexed drawing:

Fig. 1 is an end elevational view of one form of rotary brush unitassembled in accordance with my invention;

Fig. 2 is a sectional view through such unit taken along the line 22 onFig. 1; and

2,935,756 Patented May 10, 1960 Fig. 3 is-a fragmentary sectional viewtaken along the line 3'-3 on Fig. 1.

Referring now more particularly to said annexed drawing, the brushconstruction there illustrated comprises a cylindrical sheet metal core1 having a length of helically wound brush strip 2 seated thereon. Suchbrush strip may desirably be of the general type illustrated anddescribed in my Patent No. 2,303,386 having a sheet metal channelformbase 3 and stranded brush material 4 doubled and retained thereinbeneath an elongated retaining element such as wire 5. Such wire in turnmay be secured in place by means of overlapping teeth 6 punched in fromthe respective sides of channel 3. Other types of brush strip havingbrush backs similar to channel 3 are well known in the art and maylikewise be employed in the construction of this invention.

The cylindrical core portion 1 will preferably be formed from a fiatsheet of steel having holes 7 punched therein, for a purpose to beexplained below. This flat sheet is then rolled to form a tube orcylinder which may be spread apart at the longitudinal seam, and one ormore axially spaced internal annular supports 8 are inserted thereinwith flanges 9 opposed to holes 10 in such core. Supports 9 may then bewelded in place within such core through holes 10, preferably by arcwelding. An end member 11 is then assembled to one end of core 1 andsimilarly welded in place through spaced holes 12 therein, only everyother of such holes as shown in Fig. 1 being utilized for this purposeat this time. End member 11 generally resembles inner supports oradapters 8 in having a similar radially inwardly extending web portion13 and .an inner axially extending flange portion 14 corresponding toradially inwardly extending web 15 and axially extending flange 16 ofsuch inner supporting'member 8. End member 11, however, includes aradially outwardly extendingflange 17 having inwardly directed teeth 18adapted to engage and overlie the adjacent lip of the channel back ofthe last turn of a lengthof helically wound brush strip 2 mounted oncore 1 (see Figs. 2 and 3). Reference may be had to my Patent No.2,609,559 for further details of such toothed end plate members.

A helically wound length of such brush strip 2 is then slid axially onthe other end of such core 1 with the brush material 4 extendingradially outwardly, but for certain types of brushes it is preferred towind such brush strip while held in tension onto such core, and then anidentical end member 11 is mounted on such other end with the helicallywound brush strip tightly compressed between such two opposed endmembers, preferably in an appropriate jig or fixture. This second endmember 11 is then similarly welded to the end of tubular core 1 throughholes 12 therein, it being noted that such holes are located at thefirst bend where radially extending flange 17 is turned inwardly .toseat against the inner periphery of core 1. Accordingly, the weld metaldeposited in holes 12 serves. not only to tack the end member to core 1but also secures the lower edge of the channel back of the last turn ofbrush strip on such core. Weld metal will, of course, similarly bedeposited in those alternate holes 12 of the first end member notalready employed preliminarily to secure such member to the core asabove described in order likewise to join the final turn of brush stripat that end of the unit to the core and end member. It will thus be seenthat the brush assembly has now been transformed into aunitary structureready to be mounted upon an arbor, mandrel, or the like. 7

Flanges 14 and 16 of the end and intermediate supponting members may beannular as shown to accommodate an arbor of round cross-section oralternatively of any desired conformation to conform to an arbor of.square,.hexagonal or other shape. The extent of radially inwardlyextending web portions 13 and 15 will, of course, depend upon therelative diameter of the arbor Pon 'which..the brush unit is to:bemounted; Likewise, the number and spacing of such intermediatemembers--8 -which serve both1as adapters and as rigidifying memsbers willdepend upon the strength characteristics .re-

'.''quired.

The radially inwardly extending web portions. 13 of rendmembers 11 maybe cut away to provide .aligned 'keyways- 19 aligned with similarkeyways 2%) in webs of the intermediate supporting members 8, suchkeyways daeingadapted to receive a key inserted in a correspond- .ingkeyway in'the arbor (not shown). Of course, if t such' arbor is ofpolygonal cross-section, the provision I105 suchkeyway will not-berequired.

':'Webs'-13: of :end members. ill will desirablyalso be :provided withapertures 21. therein and webs l5 ofmembers 8 with similar apertures 22to provide for'theen- ::trance:.of a fluid mediuininto the space betweenthe routerv periphery of the'arbor andthe inner periphery of word 1. Theholes 7 in such core then provide for the ;radially outward escape ofsuch fluid medium from this -.-space through the action of centrifugalforce. To facilidate further radially outward escape of the fluid mediumbetween the turns of brush strip 2,.the channel back 3 of such strip maydesirably be deformed in the manner .-described in detail in my PatentNo. 2,409,309. In

wordinary operation, air will thus be drawn inwardly .T;through openings21 by the rapidly rotating. brush and expelled.throughholcs 7 betweenthe turns of brush .tstrip, thereby obtaining an important coolingeffect. If

- desired, other gaseous or liquid cooling media may be supplied to theend of the brush unit for passage therethrough in the manner indicated,and for some operations fine abrasive may be transported to the brushsurface in this manner.

.The above-described embodiment of my invention is particularlyadvantageous where it is desired to mount ---:an'- annular rotary brushunit of large inner diameter on an arbor which may be of a relativelysmall diameter.

.It' will be seen from the foregoing that I have provided .an improvedbrush construction whereby a helically Wound length of brush strip maybe mounted on a generally cylindrical core and madeintegral therewith so45 --that:tl1e-brush may be handled as a unit even'when of-=very.largesize. The advantages of this arrangement, .particularly'overthat usually employed where the helically. wound brush strip is mounteddirectly on the arbor, shave been explained above. From a practicaloperating Lepoint of view, the fact that blushes of this type may be Iremoved and replaced upon their arbors with a minimum ..-1'ofdown timehas been found to be of very great value.

ZItwill, of course, be understood that the term brush -as usedherein andin the claims is intended to include closely related articles such asrotary buffs, the particuwlarzfiller material not constituting any partof the present --invention. Helically wound brush strip manufactured-llI1-8CCO1d2ll1C6 with my prior Patent 2,303,386, for ex .ample, isrelatively inexpensive of manufacture, as are also-the stampings such ascore members 1 and end mem- -'-bers"11. -When rigidly assembled, as bywelding, a complete brush unit is produced at low cost whichnevertheless will withstand difficult operating conditions. Intermediateturns of the helical brush strip may be welded "to the generallycylindrical core through holes such as 7 "in such core 1. This is oftendesirable in the case of relatively long roller brushes.

"l This application is a division of my co-pending application SerialNo. 173,464, filed July 12, 1950, for R- .ttary Brush Construction, nowPatent No. 2,757,401, -dated-August 7, 1956.

.Othenmodes of applying the principle of. the invention n-may :beemployed-change being. ,madeaszregardsi the-de- 4 tails described,provided the features stated in any of the following claims or theequivalent of such be employed.

I therefore particularly point out and distinctly claim as my invention:

1. A rotary brush unit comprising a cylindrical sheet metal core,helically wound brush strip having a metal channelform back seated onsaid core with brush ma- .terial retained therein and extending radiallytherefrom, annular end. members. having generally cylindrical porlotions seated within the respective ends of said core with peripheralflanges extending radially outwardly therefrom adjacent .the final.turns of said brush strip and annular flanges extending radiallyinwardly therefrom having central openings adapted to fit acorresponding. arbor, teeth on such outwardly extending flangesoverlying and engaging the outer periphery of such final turns of such.channelform back of said brush strip, holes through said end membersadjacent .the ends of said cylindrical core,

23 weldmetal in. such holes securing said core to said end ...membersand such final turns of brush strip, and an intermediate annularsupporting member seated within .-said cylindrical core and weldedthereto, said intermediatemember having a central opening of the samedi- ..mensions as. suchv openings in said end members, said rendmembersxand said intermediate member having openings therethroughintermediate such central openings and said core to permit entry andaxial flow of air inthe space between said core and such arbor, and saidcore having a plurality of openings therein to permit radially outwardescape of air'from such space.

2. Arotary'brush unit comprising a cylindrical metal core, helicallywound brush'strip having a metal back seated on'said core with brushmaterial extending radially therefrom, annular end members seated in the.respective ends of said core with peripheralflanges extending radiallyoutwardly adjacent the final turns of a said brush .strip. and annularflanges extending radially inwardly having central openings adapted tofit a correspending arbor, teeth on such outwardly extending flangesclosely" overlying .such .back of such respective final turns of'saidbrush strip, holes through said end mem- '-bersadjacent the ends of saidcylindrical core, weld metal in such holes securing said core to saidend members and such final'turns of brush strip, and an inter- "mediate'annular'supporting member seated within said "'cylindricalcoreand'weldedthereto, said intermediate member having a central opening ofthe same dimensions as such openings in said end members, said end-members and said intermediate member having openings therethroughintermediate such central openings and said =.core-to permit entry andaxial flow of air inv the space between said. core and such arbor, andsaid core having a plurality of openings therein to permit radiallyoutward escape of air from such space.

3. A'rotarybrush unit comprising a cylindrical sheet --metal core,-hclically formed brush strip having a metal channelform back seated-onsaid core with brush ma- -terial retained therein and extending radiallytherefrom, the end portions of said back being welded to said core tohold said'helically wound brush strip firmly seated jthereon, annularend members welded to said core having radially outwardly' extendingflanges laterally supporting such end turns of brush strip and inwardlyextending .fianges having aligned central, openings adapted to fit acorresponding arbor, and an annular supporting member seating the innerperiphery of said core intermediate said end members and provided-with acentral opening wofsthesame dimensions as such central openings in said.5;end.members:and aligned therewith.

(References; on followingspage) 5 References Cited in the file of patentUNITED STATES PATENTS Goodrich Oct. 3, 1916 Adams Jan. 10, 1922 5Lohmann Mar. 7, 1944 Wesemeyer May 23, 1944 6 SCheer July 10, 1945Peterson Sept. 9, 1952 Crevier Feb. 14, 1956 FOREIGN PATENTS GreatBritain 1901

